CVE-2026-26956

Modified Modified - Updated After Analysis

Full Sandbox Escape in vm2

Publication date: 2026-05-04

Last updated on: 2026-06-30

Assigner: GitHub, Inc.

Description

vm2 is an open source vm/sandbox for Node.js. In version 3.10.4, vm2 is vulnerable to full sandbox escape with arbitrary code execution. Attacker code inside VM.run() obtains host process object and runs host commands with zero host cooperation. This issue has been patched in version 3.10.5.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-05-04

Last Modified

2026-06-30

Generated

2026-07-06

AI Q&A

2026-05-05

EPSS Evaluated

2026-07-05

NVD

CVE-2026-26956

EUVD

EUVD-2026-26995

Affected Vendors & Products

Vendor	Product	Version / Range
vm2_project	vm2	to 3.10.5 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-693	The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.
CWE-653	The product does not properly compartmentalize or isolate functionality, processes, or resources that require different privilege levels, rights, or permissions.

Attack-Flow Graph

Compliance Impact

The vulnerability in vm2 allows an attacker to escape the sandbox and execute arbitrary code on the host system without cooperation from the host. This can lead to unauthorized access, data breaches, and potential manipulation or exfiltration of sensitive information.

Such unauthorized access and potential data compromise could negatively impact compliance with common standards and regulations like GDPR and HIPAA, which require strict controls over data confidentiality, integrity, and access.

However, the provided information does not explicitly mention compliance impacts or regulatory considerations.

Executive Summary

The vulnerability exists in vm2 version 3.10.4, an open source sandbox for Node.js. It allows an attacker to escape the sandbox completely and execute arbitrary code on the host system. Specifically, code running inside VM.run() can access the host process object and execute host commands without any cooperation from the host.

This issue was fixed in version 3.10.5.

Impact Analysis

This vulnerability can have severe impacts because it allows an attacker to break out of the sandbox and execute arbitrary commands on the host system. This can lead to full system compromise, data theft, data corruption, or disruption of services.

Mitigation Strategies

To mitigate this vulnerability, you should upgrade vm2 to version 3.10.5 or later, where the full sandbox escape issue has been patched.

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